Post by Pricescope » November 14th, 2003, 11:30 am
United States Patent Application: 20030188551

High Yield Diamond

Patenting in diamond cutting is flourishing in the last few years. Many companies including Tiffany and Hearts on Fire try to patent their exclusive designs.

This particular application is interesting because it claims improving yield by adding extra pavilion facets and therefore make the stone heavier (more expensive?). Good example when extra facets not equal to better looking diamond.

I like their Description of the Prior Art, however, and especially this paragraph
[0013] Today's diamond consumer is typically a highly discriminating and well educated shopper, looking for the highest value out of his or her investment. At the same time, the diamond supplier wants to obtain the highest yield from a given piece of rough. Currently, 10%-50% retention is good for a brilliant cut diamond. Since the price per carat increases exponentially in proportion to the carat weight of a particular stone, it is highly desirable to increase the yield, and conversely decrease the waste, from a given rough. The same light and dispersion can be obtained at less cost through weight retention during the faceting process.


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Pricescope